We've taken the work out of conservation quality matting with our archival, pre-cut exhibition mats. Your favorite artwork can be preserved for future generations when matted with our Kensington 100% cotton fiber mats. Board is buffered with a 3% calcium carbonate for an alkaline reserve to retard acid migration and manufactured to resist fading, discoloration and embrittlement. Beveled mats are hand-cut and consist of a 4 ply window mat, and a 2 ply backer board, hinged on the long side with our acid-free linen cloth tape, used by conservators worldwide. Mats are available in a variety of sizes with centered openings to accommodate both vertical and horizontal use. Available in White (WH), or Antique White (AW). Price per package of 5. If you don't see the size you are looking for, please note that we also offer Custom Window Mats. See Order Form for details.